The trinuclear platinum(II) complex in Vezes' red salt as a building block of coordination polymers

摘要

One-dimensional (1D) and three-dimensional (3D) coordination polymers comprising triangular [Pt-3(NO2)(6)(mu(3)-O)](2-)([Pt3](2-)) units were prepared from K-2[Pt-3]center dot 3H(2)O (1), also known as Vezes' red salt. The reaction between 1 and excess 18-crown-6 ether afforded the 1D coordination polymer [K(18-crown-(6))](2)[Pt3] (2), whereas the reaction between 1, excess 18-crown-6 ether, and AgPF6 afforded the 1D coordination polymer [Ag(18-crown-6)](2)[Pt3]center dot(CH3)(2)CO (3). However, the reaction between 1 and equimolar amounts of 18-crown-6 and AgPF6 afforded the 3D coordination polymer [Ag-2(18-crown-6)][Pt3]center dot(CH3)(2)CO (4). Furthermore, the 3D coordination polymer [Ag2Pt3(mu(3)-O)(NO2)(6)((CH3)(2)CO)(2)]center dot(CH3)(2)CO (5) containing three Pt2+. Ag+ dative bonds was obtained by the reaction of 1, Bu4NPF6, and AgPF6. The N-2, O-2, and CO2 gas absorption isotherms of 1-5 were obtained, revealing that the dry crystals of 4 exhibit a selective CO2 absorption ability.